This is NOT the Japanese Blue Sky Stream
Blue Sky Stream (Korean) is the seventh expansion of the Pokémon Card Game Sword & Shield Era. The expansion focuses on the Alloy Pokémon Duraludon and the Sky High Pokémon Rayquaza, both of which are included as Pokémon V and Pokémon VMAX, the former featuring its Gigantamax form.   (Source:bulbapedia)
 
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